FULLONIAN : COTTE8WOLD HILLS. 
I obtained the following fossils from the clay above the 
economic fuller's earth : 
Belemnites aripistillum. 
parallelus. 
Cardium. 
Ceromya. 
Cyprina. 
Isocardia. 
Ostrea subrugulosa P 
Pec ten demissus. 
vagans. 
Placuiiopsis socialis. 
Rhynchonella varians. 
Waldheimia ornithocephala. 
Myacites juraesi P 
A number of Ostracoda and some Foraminifera have been 
obtained from the economic bed of fuller's earth, by Pro r . T. R. 
Jones and Mr. C. D. Sherborn.* 
A Pit at Odd Down showed the following section, which was 
recorded by H. W. Bristow : 
FT. IN. 
Great Oolite - Limestone - -60 
f Yellow marl, very soft - - - 7 
j Blue clay - - - - - 2 6- 
Bubbly rock, blue in the inside, with 
BI n -at j-i, yellow coating - - - 7 
Fuller8Earth < Bastard fuller's earth, blue - -50 
Rubbly rock as before - - -16 
Blue fuller's earth, variable - - 3 6 
_ Bubbly rock as before. 
A well at JBeckford's Tower, on Lansdown, noted by Bristow, 
proved the following strata : 
FT. IN. 
Great Oolite - - - . - - 30 
Fuller's Earth. Light-grey clay with occasional layers 
of thin stone - - 70 
Sand [? Inferior Oolite]. 
Bath and the Cotteswold Hills to Chipping Norton. 
At the Box tunnel the thickness of the Fullonian formation 
has been estimated to be 148 feet,f but as the wells at Bath do not 
prove more than 70 feet of the beds, I think that thickness must 
have been overestimated. 
Highbarrow Hill and Kelston Round Hill near Bath, are 
capped by tiny outliers of Great Oolite, resting on Fuller's 
Earth clay with Rhynchonella varians, &c. 
In a lane east of Skughterford, north-west of Corsham, the 
thickness of the beds was estimated at 65 feet by Prof. Hull and 
there the marls and clays contained a central division, about 10 
feet thick, of Fuller's Earth Rock.J The Rock has not been 
recognized further north, although occasional layers of earthy and 
shelly limestone or calcareous sandstone, are met with in the blue 
and yellow shales and marly clays that represent the Fullonian 
formation. 
Northwards along the Cotteswold Hills, the exposures are few 
and far between, tor the beds are not worked for economic 
* See Geol. Mag., 1886, p. 272, and Proc. Bath Nat. Hist. Club, TO!, vi. p. 249. 
f Lycett, Cotteswold Hills, p. 85. 
j Geol. parts of Wilts and Gloucestershire, p. 12. 
Q 2 
